void main() {
  var obj = new Map();
  obj['name'] = 'zs';
  obj['name'] = () {};
  print(obj);
  List<int> arr = [1, 2, 34];
  arr.add(12);
  arr.forEach((a) => {
        if (a == 1) {print('11111')} else {print(a)}
      });
  print(arr);
}
